Boldenone Undecylenate

Mechanism of Action

Boldenone is a testosterone analog with a 1,2-dehydro modification (double bond at C1-C2), which reduces androgenic activity while preserving anabolic effects. The undecylenate ester provides very slow release over 3-4 weeks. Boldenone aromatizes at approximately 50% the rate of testosterone, producing moderate estradiol. A unique feature is its significant stimulation of erythropoiesis via direct kidney erythropoietin release. Studied for lean mass gains, endurance enhancement (via increased RBC), and appetite stimulation in veterinary research.

Evidence Level

In Vivo - Animal

12 studies published